Internal-combustion engine



.Rl ROOF.

INHRNAL COMBUSTION ENGINE.

V"1M/VEN TOR.

II. MI POOF.

' INIEIINAI. CONIBUSTION ENGINE.

l w im im APPLICATION FILEDIJUNEQII 1920. y L L i W a 515% 1 y' j :mummy 23, 19%.

3 SHEETSSHEET 2, Mahr.,

ITTORNEKS R. M. ROOF.

INTERNAL COMBUSTION NGN.

APPLICATION FILED JUNE the same by means of bolts (not shown) extendingthrough "the openings 2T. Said bolts also may be adapted to rigidlysecure the cylinder head 19 to the cylinder block 1l. liach of thecylinders provided with 'tour similar valvedv ports Zit), each beingadapted to receive a similar valve member 251. Each valve 31 is providedwith stems 32 which extend upwardly through the openings in the cylinderhead and carry upon their upper ends spring members B3. The spring 33normally maintains said valve 31 in the seated position, said spring 33being secured between the cylinder head and a washer 34 suitably securedto the stein 331 The particular arrangement of tlie:'i"ntake ports .20and the exhaust ports 21 with the valve ports 30 communicating therewithis shown in detail in Figs. .2 to T inclusive, and reference will be hadthereto. As previously stated, each intake.' port )U communicates withtwo adjacent cylinders. and since the valve portsV 30 in each cylinderare substantially similar, said valves may be used interchangeably torexhaust or intake. valves, as described. Thus. in Fig. 2. the fouradjacent valve ports 3() in each of the tWo adjacent cylinders communiate lwith the intake ports.: Each of the several intake valves 3()communicates with the intake port 20, and the cylinder wall adjacentthereto is formel1 such that the direction of the incomingr gases isregulated by the separating and projecting partition 5t) between eachtwo of the ports communicating with the Same cylinder. Similarly. thetwo adjacent ports, each of which comnnmicates with an adjacentcylinder, is separated by a detiecting partition 51. When the cylinderwall or chamber is arranged as shown. substantially equal amounts ot'gas or t'uei is supplied throughiau'h of the valves tit).

As heretofore described. the exhaust [ports 21 are three in number. themiddle one ot which communicates with two otl the cylinders through theadjacent ports ot the adjacent cylinders. llach of the other Vtwo ports2l communicate with the two adjacent ports litl'ot' each ot' the endcylinders. A partition wall 5; is similar in construction to thepartition wall 5t) described with relation to the intake valves. but inthis instance the partition wall 52 serves to detiect thc heated amlexhausted gases into the cxhaust port 2l. ln addition to defiecting saidgases. said partition separatcs the gases discharging 'from thedifl'erent ports, vso .that the mechanism ot` one valve protected fromthe rases o1' the other valve when they same opens or cracks before theirst mentioned valve opens.

ln each of the intake ports Q0, the vproject- 'ing partition 51 ispositioned such that the gases have tree passage to either of thecylinders, said passage in each instance being the cylinder head isconstructed 1n the manner shown. the flow of gases to and t'rom theintake and exhaustports from the valves is unobstructed, and thefriction is reduced to a minimum. l

'iththe construct-ion shown'herein, see Figs. 1, 2, 3 and 1, the intakemanifold and exhaust manifold and the ignition system all may bepositioned upon one side ot' the engine, leaving the other side tree toreceive and support the valve ope 'atingmechanism, said valves beingpositioned in the heads ot' the cylinders rather than in the side. ashas heretofore been the usual practice. This arrangement of themanifolds. spark plugs, and valve. operatingmechanism permits thecylinder head when installed upon an engine ot' the V-block type toutilize a common intake line and a common exhaust liuc.

Suitable protecting means are provided toinprotecting the valvemechanism hereinbefore described. and said means comprises outwardlyprojecting portions` such as the ilanged brackets titi positioned uponthe Yalve side ot the cylinder. sce Figs. :2, S and t). Suitableprotecting plate means G1 are adapted to be secured to the flangedbrackets t() and protectmihc valve operating rods 42K t'rom casualinjury. suitable cover cap (i2 is adapted to be secured to the cylinderhead l5) by the bolt and nut means (S3 and (S4 respectively. see Fig. l.said bolt means being seatable in the threaded openings 65 see Figs. Sand 9.

The invention claimed is: 1. A\ cylinder head construction for amulti-cylindered internal combustion engine, including a plurality ollchambers. an exhaust chamber and an intake chamber of said chamberscommunicating with cach cylinder. exhaust chambers ot two adjacent'lcylinders communicating with each other within the cylinder head. intakechambersol` two' adjacent cylinders connnunicaling with each otherwithin the cylinder head. all ot said chambers opening on the saine sideot' the engine. and a plurality ol' valves in each chamber.

i2. cylinder head construction t'or a 'four cylinder intern'alcombustion engine. including` an intake manitoldand au exhaustmanit'old\ upon the same side, comprising a pair meer? yiply fuel tosaid cylinder, the six intermediete chambers being grouped in pairs,euch pair communicating with each other Within.

the cylinder head, seid cylinder heed being provided 'with vbut fiveopeningsv upon the same side, three being adapted to be connected to onemanifold and the other two to the other manifold, seid five openings being positioned in staggered relation7 the end openings eachcommunientine` with one oi" said chambers, and each of the intermediateopenings communicatingwit'h one of snid peil-s ot communicatingchambers.

3. A cylinder heed construction 'tor i tour cylinder internal combustionengine, includL ing an intake `nienitold anden exhnnst manifoldcomprising e pair oit sepninted chann- -bers for each cylinder, onechamber beingv ladapted to discharge gases from the cylinder und theother of seid pair of chambers being adapted to supply fuel to saidcylinder, seid cylinder head being provided 'with but -live openingsupon the sume side, three being adapted to be connected to one manifoldand the other two to the other manifold, seid tive openings beingpositioned. in staggered relation, the end openings'each' communicatingwith one of seid chambers, end euch ot the intermediate openingscomnnnicntlng lwith two ot said chambers, and a plnreiitj ct valves ineach chamber.

4.- A. cylinder heed construction for a, tonr cylinder internalcombnstionengine, includn ing an intake manifold and an exhzinst maniffold upon the seme-side of the engine com.

prising a pair of" separated chambers Jforl each cylinder, one Aohcmnberbeing adapted to discharge gases from the cylinder and the otherof seidpair otichernbers being adapted to supply t'nel to said cyliiuglcr, thesin intermediate chambers boing 1grouped in pairs and opening),- upontbc sanne side oi the cyiinder'hefid, each pair communicating with eachother within the cylinder heed, said cylinder head being in'ovided with-bnt tive openings upon the sanne side ot the cylinder bend, threebeing; adapted to be connected to one mnniioid and the other two to theothernninitold, suid live openings being positioned in staggered.relation, the end openings ench communicating with one of seid chambers,each oi? the intermediate opening-s con'imunicating with one of saidpair ot comnninicnting" chambers, and ephr inlity of valves 'in eachchamber. i

5. An overhead vaive construction for e cylinder, inciudingtour valveports, a. pair oit passages Within the cylinder, each pessngccommunicating with e parir of seid ports, the Wells of each pessegebeine" curved ont erdly in elbow formation, end the heed ot each of seidpassages between the ports beingf extended 'forward-iv sind curved toterm e partition therebetween and provide n `free passage for the gasesWithin said4 cylinder through seid passage to and from the ports. 4

An overhead valve construction for two cylinders including tour vulveports, e pair oit' passages within the cylinder, eac-h coin-Iniiniciitingg` with n pair ofseid ports and with each other, the Wallsof each of said passages beine4 curved outwardly in elbow l formationund' the head oi5 eech of seid pas my signature. RBERT M. ROOF.

